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new wheels and rotor warping?

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  #1  
Old 12-11-2009 | 03:36 PM
inspector
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Default new wheels and rotor warping?

98 Accord EX

Two years ago i replaced the wheels on my Accord with new, non-OEM wheels.

I live and drive in Wisconsin.

I had a brake job done (reputable mechanic) and the following spring
the rotors were warped. He replaced them without charge.

The next spring, the rotors were warped again. He placed them without
charge.

He and I are both perplexed. I never had this problem before.

The non-OEM wheels are much more "open" (spoked) than the original
wheels.

Is it possible the new wheels allow too much snow and slush to hit the rotors?????

Anyone ever heard of/had this problem?

Thanks in advance.
 
  #2  
Old 12-11-2009 | 04:43 PM
poolman's Avatar
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Joined: May 2008
Posts: 80
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The two most common reasons for warped rotors other than turning them too thin are over-tightening of the wheels and sudden temp changes on the rotors. I have seen some shops torque the lugs to over 150 ft lb's
 
  #3  
Old 12-11-2009 | 04:46 PM
PAhonda's Avatar
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Joined: Sep 2006
Posts: 15,995
From: Houston, TX
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The open wheels could let more snow/water hit the hot rotor and cause it to warp.

Another possibility is that the caliper is causing the brake pads to drag and overheat the rotors. Are the brake pads wearing excessively? Are both pads wearing out at the same rate?
 
  #4  
Old 12-11-2009 | 07:06 PM
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Joined: Aug 2007
Posts: 1,150
From: Chesterfield MI 48047
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A lot of rotors even OEM Honda’s have some warpage right out of the box and some of the cheap ones will pulsate badly out of the box if install without turning them. Something I leaned working at the Honda dealer which may have changed is the flat rate time given to replace rotors includes turning them. I never saw any mechanic doing this step. I did the used cars there. According to some websites the warpage comes from the pads as pad material is transferred to rotor. I am not a 100% that over tightening the wheels will warp a rotor as you are just clamping the hub part of the rotor. I finally put rotors on my 95 Accord a few years back which pulsated over a decade and they are warped again currently. I have Honda rotors and pads along with torquing the wheel to the proper specs but I reused the at the time recently replaced pads. I have seen more warpage problems after the change in pad material we now use. I will make a guess and say the pads are causing your warpage problems and the rotors are warped slightly out of the box.
 
  #5  
Old 12-12-2009 | 09:19 AM
inspector
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Default i should have added this...

After both brake jobs the brakes worked fine thru the spring, summer and into the winter. It was late winter/spring, both times, that the brakes began to pulsate badly.

On the second replacement, the mechanic put in top of the line rotors.

Also, previous to changing the wheels I never had any problems with the brakes.
 
  #6  
Old 12-14-2009 | 10:22 AM
JimBlake's Avatar
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From: Wisconsin
  #7  
Old 09-29-2010 | 09:21 PM
erendresen's Avatar
Joined: Sep 2009
Posts: 2
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i found the answer to some of these. I had the same problem with my right front rotors warping way too fast. i tried everything including ball joints, new calipers, etc.
it came down to a worn bearing. what happens is there is only one thousandths tolerance on the rotor before you feel the shimmy. and the wheel bearing was allowing way too much play in the rotor, so it actually created the warp. once i replaced the bearing and rotor, it was fine and has been since.
 
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